Seraph of the End
Owari no Seraph, Seraph of the End: Vampire Reign
After a catastrophic epidemic kills every adult on earth, vampires arise from the shadows to enslave the remaining human population. Yuichiro and his friends are kept as vampire fodder in a creepy underground city. Yuichiro dreams of one day fighting back, and the first step is staging a daring escape from their vampire overlords...